//package com.example.professorevaluation.bean
//
//import androidx.room.ColumnInfo
//import androidx.room.Entity
//import androidx.room.ForeignKey
//
///**
// *@author: wangtianxiong
// *@time: 2022/3/29
// *@describe:
// *
// */
//@Entity(
//    primaryKeys = ["userId", "groupId", "songId"],
//    foreignKeys = [ForeignKey(entity = GroupInfo::class, parentColumns = ["groupId", "userId"], childColumns = ["groupId", "userId"], onDelete = ForeignKey.CASCADE)]
//)
//class CombinationBean {
//    var name: String? = null
//    var university: String? = null
//    var courses: String? = null
//    var content: String? = null
//    var rate: Int = 0
//    var difficulty: Int = 0
//}